Balance 30 Captive Portal - requests new authentication after user web timeouts

We are using a Balance 30 (firmware 6.2.2 build 3008) with a 30Mbps X 30Mbps terrestrial microwave internet connection (Static IP). We are using the Captive Portal with no bandwidth restrictions. We have a customer with the following issue - *There is a little issue with the connection time outs. Sometimes when a large download is running - like an OS update - and there are some longish pauses - like torrent downloads have from time to time - the system goes into a timeout and requires another pass at the captive portal.
Do you have any information on what could be happening and any possible resolution?

Thank you for your help.

We would need to take a closer look at this, please open a support ticket for a deeper dive: